CN104422638A - Device and method for detecting concentration of micro-particulate matter in air sample - Google Patents
Device and method for detecting concentration of micro-particulate matter in air sample Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 28
- 239000013618 particulate matter Substances 0.000 title abstract 6
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 239000002245 particle Substances 0.000 claims description 178
- 239000000758 substrate Substances 0.000 claims description 56
- 238000012937 correction Methods 0.000 claims description 23
- 238000009792 diffusion process Methods 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000000443 aerosol Substances 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000005250 beta ray Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
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Abstract
A device for detecting the concentration of micro-particulate matters in an air sample comprises: a container used for accommodating the air sample and provided with an opening; a sealing mechanism used for opening or closing the opening; a sensor arranged in the container and used for sensing a total concentration of the micro-particulate matters in the air sample; and a controller connected to the sensor and used for controlling the sealing mechanism. The controller controls the sealing mechanism to open the opening and controls the sensor to sense the total concentration of a first particulate matter. When the container is sealed for a preset time since the controller controls the sealing mechanism to seal the opening, the sensor is controlled to sense the total concentration of a second particulate matter. A proportion of the concentration of the micro-particulate matters to the total concentration of the particulate matters is calculated according to a preset relationship between a proportion of the concentration of the micro-particulate matters to the total concentration of the particulate and a proportion of the total concentration of the second particulate matter to the total concentration of the first particulate matter. The concentration of the micro-particulate matters in the air sample is calculated according to the total concentration of the first particulate matter and a proportion of the concentration of the micro-particulate matters to the total concentration of the particulate matters.
Description
Technical field
The present invention relates to Detection of Air Quality, particularly, relate to a kind of equipment, method, sensor and the air purifier that are equal to or less than the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter detected in air sample.
Background technology
In recent years, along with the burst of fast industrialization and vehicles number increases, air pollution becomes day by day serious.In China, especially since at the beginning of 2013, finely ground particles in air is property air pollutants representatively, especially (equivalent aerodynamic diameter is equal to or less than the particle of 2.5 microns to fine particle, also referred to as PM2.5) concentration remain on higher level, haze weather significantly increases.Health and the daily life of people suffer serious threat.Therefore, the checkout equipment for detecting molecule substrate concentration is needed.
At present, there is multiple method to detect the finely ground particles in air, comprised such as quartz oscillation micro-day quadratic method, β ray method and light scattering method.Inertial impactor is mostly needed to be separated with larger particles by finely ground particles as front-end equipment in these methods.Such as, patent documentation CN102680349A discloses a kind of PM2.5 monitoring equipment using inertial impactor.Although inertial impactor has good size separating power, its high cost, large volume and the accurate control to airflow rate limit its application in the family.
On the other hand, traditionally use sedimentation method detects the particle size distribution in liquid phase.Such as, patent documentation JP2011179862 discloses the computing method of the particle settling velocity in a kind of liquid phase.Then, although the particle in air also has settling process, this process is very different from the settling process in liquid phase.The viscosity of air is much smaller than the viscosity of liquid, and the Blang's diffusion therefore in air can not be ignored.Because the many factors of Blang's diffusion couple are responsive, such as concentration gradient, temperature, particle size etc.Therefore, for the suspended particulate substance in air, be difficult to the accurate detected magnitude distribution of sedimentation method.
Summary of the invention
The object of this invention is to provide a kind of equipment being equal to or less than the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter detected in air sample, method, sensor and air purifier, under the prerequisite significantly not increasing cost, comparatively accurately detect the concentration of finely ground particles.
According to a first aspect of the invention, provide a kind of equipment being equal to or less than the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter detected in air sample, comprising: container, for holding air sample, and there is opening; Sealing mechanism, for opening described in opening and closing of fault; Sensor, is placed in container, for the total concentration of the particle in the air sample in Sensing container; And controller, be connected with described sensor, and for controlling described sealing mechanism.Described controller is configured to: control described sealing mechanism and open opening, and control sensor and sense the first particle total concentration; At the described sealing mechanism closing openings of control with after making seal of vessel predetermined amount of time, control sensor and sense the second particle total concentration; According to the predetermined relationship between the ratio of molecule substrate concentration and particle total concentration and the ratio of the second particle total concentration and the first particle total concentration, calculate the ratio of molecule substrate concentration and particle total concentration; And according to the ratio of the first particle total concentration and molecule substrate concentration and particle total concentration, calculate the molecule substrate concentration in air sample.
In one embodiment, described predetermined relationship is expressed as the correction coefficient obtained by following operation: the reference air sample with the ratio of known molecule substrate concentration and particle total concentration is injected container; Sensor is used to sense the first reference particles thing total concentration; After predetermined amount of time described in seal of vessel, sensor is used to sense the second reference particles thing total concentration; By the ratio of the ratio of known molecule substrate concentration and particle total concentration divided by the second reference particles thing total concentration and the first reference particles thing total concentration, to calculate described correction coefficient.
Preferably, described container also comprises: check (non-return) valve, opens, close when closure of openings when opening is opened; Described equipment also comprises: pneumatic pump, under the state that opening is opened, by check (non-return) valve withdrawing air from container, enters container and accelerate the diffusion of container endoparticle thing with the air accelerating external container by opening.
Preferably, described opening is positioned at the below of described sensor.
Preferably, described predetermined value is 2.5 microns.
Preferably, described predetermined amount of time is 3 minutes.
According to a second aspect of the invention, provide a kind of sensor, comprising: sensing cell, comprise the air duct running through sensing cell, and be configured to the concentration of the particle sensed in the air sample in described air duct; Sealing mechanism, for opening and closing of fault air duct; And controller, be connected with sensing cell, and for controlling described sealing mechanism.Described controller is configured to: control described sealing mechanism and open air duct, and controls sensing unit senses first particle total concentration; After the described sealing mechanism closed air passage predetermined amount of time of control, control sensing unit senses second particle total concentration; Predetermined relationship between the ratio being equal to or less than the molecule substrate concentration of predetermined value and the ratio of particle total concentration and the second particle total concentration and the first particle total concentration according to equivalent aerodynamic diameter, calculates the ratio of molecule substrate concentration and particle total concentration; And according to the ratio of the first particle total concentration and molecule substrate concentration and particle total concentration, calculate the molecule substrate concentration in air sample.
In one embodiment, described predetermined relationship is expressed as the correction coefficient obtained by following operation: the reference air sample with the ratio of known molecule substrate concentration and particle total concentration is injected air duct; Use sensing unit senses first reference particles thing total concentration; After air duct is sealed described predetermined amount of time, use sensing unit senses second reference particles thing total concentration; By the ratio of the ratio of known molecule substrate concentration and particle total concentration divided by the second reference particles thing total concentration and the first reference particles thing total concentration, to calculate described correction coefficient.
Preferably, described predetermined value is 2.5 microns.
Preferably, described predetermined amount of time is 3 minutes.
According to a third aspect of the invention we, provide a kind of air purifier, comprise according to the equipment of above-mentioned first aspect or the sensor according to above-mentioned second aspect.
According to a forth aspect of the invention; provide a kind of method being equal to or less than the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter in air sample in inspection instrument, comprising: the first initial particle total concentration in sensing air sample; After seal of vessel predetermined amount of time, the second particle total concentration in sensing air sample; According to the predetermined relationship between the ratio of molecule substrate concentration and particle total concentration and the ratio of the second particle total concentration and the first particle total concentration, calculate the ratio of molecule substrate concentration and particle total concentration; And according to the ratio of the first particle total concentration and molecule substrate concentration and particle total concentration, calculate the molecule substrate concentration in air sample.
In one embodiment, described predetermined relationship is expressed as the correction coefficient obtained by following operation: the reference air sample with the ratio of known molecule substrate concentration and particle total concentration is injected container; Sense the first reference particles thing total concentration; After predetermined amount of time described in seal of vessel, sense the second reference particles thing total concentration; By the ratio of the ratio of known molecule substrate concentration and particle total concentration divided by the second reference particles thing total concentration and the first reference particles thing total concentration, to calculate described correction coefficient.
Preferably, described method also comprises: under the unencapsulated state of container, and the air using pneumatic pump to accelerate external container enters container and accelerates the diffusion of container endoparticle thing.
Preferably, described predetermined value is 2.5 microns.
Preferably, described predetermined amount of time is 3 minutes.
According to embodiments of the invention, under the prerequisite significantly not increasing cost, can comparatively accurately detect the concentration of particulates thing.
Accompanying drawing explanation
By hereafter detailed description with the accompanying drawing embodiments of the invention, above-mentioned and further feature of the present invention will be more clear, wherein:
Fig. 1 (a) and 1 (b) are the schematic diagram of the equipment of the concentration for detecting the finely ground particles in air sample according to the embodiment of the present invention;
Fig. 2 (a) and 2 (b) are according to another embodiment of the present invention for detecting the schematic diagram of the equipment of the concentration of the finely ground particles in air sample;
Fig. 3 (a) and 3 (b) are the schematic diagram of the sensor according to the embodiment of the present invention; And
Fig. 4 is the process flow diagram of the method for the concentration for detecting the finely ground particles in air sample according to the embodiment of the present invention.
Embodiment
Referring to accompanying drawing, embodiments of the invention are described.In various figures, identical reference marker is for representing same or analogous part.
The present invention is based on the following fact: according to the ultimate principle of aerosol dynamics, larger particle sedimentation ground is faster.Therefore, for the air sample in confined space, in static settling process, in the change of particle concentration and sample, between finely ground particles and the ratio of whole particle, there is predetermined relationship.According to this relation, the approximate evaluation of molecule substrate concentration can be calculated.In the present invention, " finely ground particles " refers to that equivalent aerodynamic diameter is equal to or less than the particle of predetermined value.Exemplarily, " finely ground particles " refers to that equivalent aerodynamic diameter is equal to or less than the particle of 10 microns.Particularly, " finely ground particles " comprises the particle (PM2.5) that equivalent aerodynamic diameter is equal to or less than 2.5 microns.
Fig. 1 (a) and 1 (b) are the schematic diagram of the equipment 100 of the concentration for detecting the finely ground particles in air sample according to the embodiment of the present invention.Fig. 1 (a) and 1 (b) respectively illustrate two modes of operation of equipment 100.As shown in the figure, equipment 100 comprises: container 110, for holding air sample, and has opening; Sealing mechanism 120, for opening described in opening and closing of fault; Sensor 130, is placed in container 110, for the total concentration of the particle in the air sample in Sensing container 110.In a preferred embodiment, opening is positioned at the below of sensor 130, to prevent particle oversize in the air outside container 110 to enter in container 110 thus to cause interference to testing result.
Equipment 100 also comprises: controller 140, is connected with sensor 130, and for controlling sealing mechanism 120.
First, as shown in Fig. 1 (a), controller 140 controls sealing mechanism 120 and opens opening.Now, the air sample in container is substantially identical with the air outside container, namely has identical particle concentration.Controller 140 controls sensor 130 sensing particles thing total concentration C1 (under the state of namely opening at the opening of container 110, the particle total concentration in the air sample in container 110).
Then, as shown in Fig. 1 (b), controller 140 controls sealing mechanism 120 closing openings to make after container 110 seals predetermined amount of time, control sensor 130 sensing particles thing total concentration C2 (namely after container 110 seals predetermined amount of time, the particle total concentration in the air sample in container 110).In an example embodiment, above-mentioned predetermined amount of time is 3 minutes.
Controller 140, according to molecule substrate concentration and the ratio R of particle total concentration and the predetermined relationship between particle total concentration C2 and the ratio of particle total concentration C1, calculates the ratio R of molecule substrate concentration and particle total concentration.
Then, controller 140, according to the ratio R of particle total concentration C1 and molecule substrate concentration and particle total concentration, calculates the finely ground particles concentration C in air sample.
In other words:
C＝C1×R (1)
According to embodiment, above-mentioned predetermined relationship is expressed as the correction coefficient n obtained by following operation: the reference air sample with the ratio r of known molecule substrate concentration and particle total concentration is injected container 110; Sensor 130 is used to sense initial reference particle total concentration c1; After container 110 is sealed above-mentioned predetermined amount of time, use sensor 130 sensing reference particle total concentration c2; By the ratio of the ratio r of known molecule substrate concentration and particle total concentration divided by reference particles thing total concentration c2 and initial reference particle total concentration c1, to calculate correction coefficient n.
In other words:
n＝r/(c2/c1) (2)
It should be noted that correction coefficient n may depend on many factors, as shape and the size, the position of sensor 130 in container 110 etc. of container 110.Therefore, be difficult to use fixing mathematical formulae to calculate correction coefficient n.But, by above-mentioned experimentation, n can be obtained according to equation (2).
In one embodiment, the form of look-up table can be used to represent n.Following table 1 lists the example relationship between different c2/c1 and n:
The look-up table of table 1-correction coefficient n
| c2/c1 | 0-0.1 | 0-0.2 | 0.2-0.3 | 0.3-0.4 | 0.4-0.5 | 0.5-0.6 | 0.6-0.7 | 0.7-0.8 |
| n | 0.8 | 0.82 | 0.85 | 0.9 | 1 | 1.1 | 1.15 | 1.18 |
Particularly, after acquisition correction coefficient n, the ratio R of molecule substrate concentration and particle total concentration can be calculated as follows:
R＝n×(C2/C1) (3)
Referring now to Fig. 2 (a) and 2 (b), show according to another embodiment of the present invention for detecting the schematic diagram of the equipment 200 of the concentration of the finely ground particles in air sample.With the equipment 100 shown in Fig. 1 similarly, equipment 200 comprises container 210; Sealing mechanism 220; Sensor 230; And controller 240.The configuration of the configuration of container 210, sealing mechanism 220, sensor 230 and controller 240 and operation and the container 110 shown in Fig. 1, sealing mechanism 120, sensor 130 and controller 140 and operate substantially the same, does not repeat them here.
As shown in Figure 2, container 210 also comprises: check (non-return) valve 212, opens (as Suo Shi Fig. 2 (a)) when opening is opened, and closes (as Suo Shi Fig. 2 (b)) when closure of openings.Equipment 200 also comprises: pneumatic pump 250, under the state that opening is opened, by check (non-return) valve 212 withdrawing air from container 210, enters container 210 with the air accelerating container 210 outside by opening, and accelerates the diffusion of container 210 endoparticle thing.
Fig. 3 (a) and 3 (b) are the schematic diagram of the sensor 300 according to the embodiment of the present invention.As shown in the figure, sensor 300 comprises: sensing cell 310, comprises the air duct 312 running through sensing cell 310, and is configured to the concentration of the particle sensed in the air sample in air duct 312.Sensor 300 also comprises: sealing mechanism 320, for opening and closing of fault air duct 312.In the embodiment shown in fig. 3, one end of air duct 312 is closed, and the other end is connected with one end of the glass tube 314 for holding air sample.Sealing mechanism 320 can the other end of opening and closing of fault glass tube 314, thus opening and closing of fault air duct 312.Such as, sealing mechanism 320 can be realized by calutron.
It should be noted that the structure shown in Fig. 3 is only example.Opening and closing of fault (such as by all arranging sealing mechanism 320 at the two ends of air duct) all can be carried out by sealing mechanism 320 in the two ends of air duct 312.Glass tube 314 is optional.When not using glass tube 314, sealing mechanism 320 can direct closed air passage 312.
Sensor 300 also comprises: controller 330, is connected with sensing cell 310, and for controlling sealing mechanism 320.
First, as shown in Fig. 3 (a), controller 330 controls sealing mechanism 320 and opens air duct 312, and control sensing cell 310 sensing particles thing total concentration C1 (namely under the state of air duct 312 unlatching, the particle total concentration in the air sample in air duct 312).
Then, as shown in Fig. 3 (b), after controller 330 controls sealing mechanism 320 closed air passage 312 predetermined amount of time, control sensing cell 310 sensing particles thing total concentration C2 (namely after air duct 312 seals predetermined amount of time, the particle total concentration in the air sample in air duct 312).In an example embodiment, above-mentioned predetermined amount of time is 3 minutes.
Controller 330, according to molecule substrate concentration and the ratio R of particle total concentration and the predetermined relationship between particle total concentration C2 and the ratio of particle total concentration C1, calculates the ratio R of molecule substrate concentration and particle total concentration.
Then, controller 330, according to the ratio R of particle total concentration C1 and molecule substrate concentration and particle total concentration, calculates the finely ground particles concentration C in air sample.
According to embodiment, above-mentioned predetermined relationship is expressed as the correction coefficient n obtained by following operation: the reference air sample with the ratio r of known molecule substrate concentration and particle total concentration is injected air duct 312; Sensing cell 310 is used to sense initial reference particle total concentration c1; After air duct 312 is sealed described predetermined amount of time, use sensing cell 310 sensing reference particle total concentration c2; By the ratio of the ratio r of known molecule substrate concentration and particle total concentration divided by reference particles thing total concentration c2 and initial reference particle total concentration c1, to calculate correction coefficient n.
Particularly, correction coefficient n can obtain with reference to above-mentioned equation (2) or table 1.Then, the ratio R of molecule substrate concentration and particle total concentration can be calculated with reference to above-mentioned equation (3).Finally, finely ground particles concentration C can be calculated with reference to above-mentioned equation (1).
Embodiments of the invention additionally provide a kind of air purifier, comprise according to the said equipment 100,200 or the sensor 300.
Embodiments of the invention additionally provide a kind of method 400 being equal to or less than the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter in air sample in inspection instrument.As shown in Figure 4, method 400 comprises the following steps:
In step S410, the first initial particle total concentration in sensing air sample.
In step S420, after seal of vessel predetermined amount of time, the second particle total concentration in sensing air sample.
In step S430, according to the predetermined relationship between the ratio of molecule substrate concentration and particle total concentration and the ratio of the second particle total concentration and the first particle total concentration, calculate the ratio of molecule substrate concentration and particle total concentration.
In step S440, according to the ratio of the first particle total concentration and molecule substrate concentration and particle total concentration, calculate the molecule substrate concentration in air sample.
In an embodiment, described predetermined relationship is expressed as the correction coefficient obtained by following operation: the reference air sample with the ratio of known molecule substrate concentration and particle total concentration is injected container; Sense the first reference particles thing total concentration; After predetermined amount of time described in seal of vessel, sense the second reference particles thing total concentration; By the ratio of the ratio of known molecule substrate concentration and particle total concentration divided by the second reference particles thing total concentration and the first reference particles thing total concentration, to calculate described correction coefficient.
Preferably, method 400 also comprises: under the unencapsulated state of container, and the air using pneumatic pump to accelerate external container enters container and accelerates the diffusion of container endoparticle thing.
In an embodiment, described predetermined value is 2.5 microns.
In an embodiment, described predetermined amount of time is 3 minutes.
The invention provides a kind of equipment being equal to or less than the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter detected in air sample, method, sensor and air purifier, under the prerequisite significantly not increasing cost, comparatively accurately detect the concentration of finely ground particles.
Although below show the present invention in conjunction with the preferred embodiments of the present invention, one skilled in the art will appreciate that without departing from the spirit and scope of the present invention, various amendment, replacement and change can be carried out to the present invention.Therefore, the present invention should not limited by above-described embodiment, and should be limited by claims and equivalent thereof.
Claims (16)
1. be equal to or less than an equipment for the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter detected in air sample, comprise:
Container, for holding air sample, and has opening;
Sealing mechanism, for opening described in opening and closing of fault;
Sensor, is placed in container, for the total concentration of the particle in the air sample in Sensing container; And
Controller, is connected with described sensor, and for controlling described sealing mechanism,
Wherein, described controller is configured to:
Control described sealing mechanism and open opening, and control sensor and sense the first particle total concentration;
At the described sealing mechanism closing openings of control with after making seal of vessel predetermined amount of time, control sensor and sense the second particle total concentration;
According to the predetermined relationship between the ratio of molecule substrate concentration and particle total concentration and the ratio of the second particle total concentration and the first particle total concentration, calculate the ratio of molecule substrate concentration and particle total concentration; And
According to the ratio of the first particle total concentration and molecule substrate concentration and particle total concentration, calculate the molecule substrate concentration in air sample.
2. equipment according to claim 1, wherein, described predetermined relationship is expressed as the correction coefficient obtained by following operation:
The reference air sample with the ratio of known molecule substrate concentration and particle total concentration is injected container;
Sensor is used to sense the first reference particles thing total concentration;
After predetermined amount of time described in seal of vessel, sensor is used to sense the second reference particles thing total concentration;
By the ratio of the ratio of known molecule substrate concentration and particle total concentration divided by the second reference particles thing total concentration and the first reference particles thing total concentration, to calculate described correction coefficient.
3. equipment according to claim 1, wherein
Described container also comprises: check (non-return) valve, opens, close when closure of openings when opening is opened, and
Described equipment also comprises: pneumatic pump, under the state that opening is opened, by check (non-return) valve withdrawing air from container, enters container and accelerate the diffusion of container endoparticle thing with the air accelerating external container by opening.
4. equipment according to claim 1, wherein, described opening is positioned at the below of described sensor.
5. equipment according to any one of claim 1 to 4, wherein, described predetermined value is 2.5 microns.
6. equipment according to any one of claim 1 to 4, wherein, described predetermined amount of time is 3 minutes.
7. a sensor, comprising:
Sensing cell, comprises the air duct running through sensing cell, and is configured to the concentration of the particle sensed in the air sample in described air duct;
Sealing mechanism, for opening and closing of fault air duct; And
Controller, is connected with sensing cell, and for controlling described sealing mechanism,
Wherein, described controller is configured to:
Control described sealing mechanism and open air duct, and control sensing unit senses first particle total concentration;
After the described sealing mechanism closed air passage predetermined amount of time of control, control sensing unit senses second particle total concentration;
Predetermined relationship between the ratio being equal to or less than the molecule substrate concentration of predetermined value and the ratio of particle total concentration and the second particle total concentration and the first particle total concentration according to equivalent aerodynamic diameter, calculates the ratio of molecule substrate concentration and particle total concentration; And
According to the ratio of the first particle total concentration and molecule substrate concentration and particle total concentration, calculate the molecule substrate concentration in air sample.
8. sensor according to claim 7, wherein, described predetermined relationship is expressed as the correction coefficient obtained by following operation:
The reference air sample with the ratio of known molecule substrate concentration and particle total concentration is injected air duct;
Use sensing unit senses first reference particles thing total concentration;
After air duct is sealed described predetermined amount of time, use sensing unit senses second reference particles thing total concentration;
By the ratio of the ratio of known molecule substrate concentration and particle total concentration divided by the second reference particles thing total concentration and the first reference particles thing total concentration, to calculate described correction coefficient.
9. the sensor according to any one of claim 7 to 8, wherein, described predetermined value is 2.5 microns.
10. the sensor according to any one of claim 7 to 8, wherein, described predetermined amount of time is 3 minutes.
11. 1 kinds of air purifiers, comprise the equipment according to any one of claim 1-6 or the sensor according to any one of claim 7-10.
12. 1 kinds are equal to or less than the method for the concentration of the finely ground particles of predetermined value for the equivalent aerodynamic diameter in air sample in inspection instrument, comprise:
The first initial particle total concentration in sensing air sample;
After seal of vessel predetermined amount of time, the second particle total concentration in sensing air sample;
According to the predetermined relationship between the ratio of molecule substrate concentration and particle total concentration and the ratio of the second particle total concentration and the first particle total concentration, calculate the ratio of molecule substrate concentration and particle total concentration; And
According to the ratio of the first particle total concentration and molecule substrate concentration and particle total concentration, calculate the molecule substrate concentration in air sample.
13. methods according to claim 12, wherein, described predetermined relationship is expressed as the correction coefficient obtained by following operation:
The reference air sample with the ratio of known molecule substrate concentration and particle total concentration is injected container;
Sense the first reference particles thing total concentration;
After predetermined amount of time described in seal of vessel, sense the second reference particles thing total concentration;
By the ratio of the ratio of known molecule substrate concentration and particle total concentration divided by the second reference particles thing total concentration and the first reference particles thing total concentration, to calculate described correction coefficient.
14. methods according to claim 12, also comprise:
Under the unencapsulated state of container, the air using pneumatic pump to accelerate external container enters container and accelerates the diffusion of container endoparticle thing.
15. according to claim 12 to the method according to any one of 14, and described predetermined value is 2.5 microns.
16. according to claim 12 to the method according to any one of 14, and wherein, described predetermined amount of time is 3 minutes.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363270.4A CN104422638A (en) | 2013-08-20 | 2013-08-20 | Device and method for detecting concentration of micro-particulate matter in air sample |
| US14/911,650 US9784658B2 (en) | 2013-08-20 | 2014-08-07 | Method and device for detecting concentration of tiny particulates in air sample |
| JP2016507919A JP6096374B2 (en) | 2013-08-20 | 2014-08-07 | Method and apparatus for detecting the concentration of particulates in an air sample |
| PCT/JP2014/004121 WO2015025495A1 (en) | 2013-08-20 | 2014-08-07 | Method and device for detecting concentration of tiny particulates in air sample |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310363270.4A CN104422638A (en) | 2013-08-20 | 2013-08-20 | Device and method for detecting concentration of micro-particulate matter in air sample |
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| CN104422638A true CN104422638A (en) | 2015-03-18 |
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| CN201310363270.4A Pending CN104422638A (en) | 2013-08-20 | 2013-08-20 | Device and method for detecting concentration of micro-particulate matter in air sample |
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| Country | Link |
|---|---|
| US (1) | US9784658B2 (en) |
| JP (1) | JP6096374B2 (en) |
| CN (1) | CN104422638A (en) |
| WO (1) | WO2015025495A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525673A (en) * | 2015-09-09 | 2017-03-22 | 富士电机株式会社 | Microparticle composition analyzing apparatus |
| CN107735667A (en) * | 2015-06-12 | 2018-02-23 | 皇家飞利浦有限公司 | Optical particulate sensor and method for sensing |
| CN115598026A (en) * | 2022-12-14 | 2023-01-13 | 水利部交通运输部国家能源局南京水利科学研究院（Cn） | Measuring system and measuring method for sediment accumulation process of water tank |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6515683B2 (en) * | 2015-05-29 | 2019-05-22 | 富士通株式会社 | Measuring device and measuring system |
| EP3690437B1 (en) * | 2019-02-04 | 2023-03-22 | Keraco, S.A. | Gas absorbing module comprising a gas sensor control device |
| CN113628399A (en) * | 2021-07-23 | 2021-11-09 | 新疆交通职业技术学院(新疆交通技师培训学院 新疆交通干部学校) | Safety monitoring system for new energy automobile |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20160195462A1 (en) | 2016-07-07 |
| US9784658B2 (en) | 2017-10-10 |
| JP2016534322A (en) | 2016-11-04 |
| WO2015025495A1 (en) | 2015-02-26 |
| JP6096374B2 (en) | 2017-03-15 |
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